Porsche 911 vs Porsche Carrara 4: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Porsche 911
85%
MOT pass rate · 74,656 vehicles
Porsche Carrara 4
85%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Porsche 911 (85%) and Porsche Carrara 4 (85%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Porsche 911 | Porsche Carrara 4 |
|---|---|---|
| MOT pass rate | 85% | 85% |
| MOT failure rate | 15% | 15% |
| Faults & advisories per test | 1.1 | 0.7 ✓ |
| Dangerous-fault share | 1% | 0% ✓ |
| Average mileage | 70,982 mi | 113,417 mi |
| Sample size (vehicles) | 74,656 | 1 |
Most common faults
Porsche 911
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Under-trays fitted obscuring some underside components
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Oil leak, but not excessive (8.4.1 (a) (i))
Porsche Carrara 4
- Nearside Front Headlamp aim too low (1.8)
- Offside Front Headlamp aim too low (1.8)
- Offside Rear Registration plate lamp not working (1.1.C.1d)
- Rear fog lamp not working (1.3.2b)
- Anti-lock braking system warning lamp indicates an ABS fault (1.6 (b))
- Offside Front Seat belt webbing slightly damaged or frayed (7.1.2 (b) (ii))
Reliability FAQ
On MOT pass rate the Porsche 911 (85%) and Porsche Carrara 4 (85%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Porsche 911 report Full Porsche Carrara 4 report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.